I was looking to save a little money by picking up a separate 3-channel amp to power my LCR speakers, while using my receiver's internal amps to power the 4 surround speakers. The external amp will be about 100X3 while the 4 surrounds will be 50X4 from the H/K 325. Is this acceptable since the surrounds are basically for effects? Or should I go ahead and spring for a 5 or 7 channel amp that will give me equal power all the way around? Will a volume mismatch occur if I use a 3-channel amp for the front and let the lower rated amplification in the receiver go to the rear? Thanks in advance.